Hermetically sealed compressor and vacuum system



April 1, 1952 J. J. DAVIS 2,591,238

HERMETICALLY SEALED COMPRESSOR AND VACUUM SYSTEM Filed May 14, 1946 2 SHEETS-SHEET 1 INVENTOR.

/0/v/v c/. 17/1103 ATTCIRN EYB April 1, 1952 J, DAVIS 2,591,238

HERMETICALLY SEALED COMPRESSOR AND VACUUM SYSTEM Filed May 14, 1946 2 SHEETSSHEET 2 4 INVENTOR. JO/M I DA V15 325 326 326% WMWM% ATTD RNEYE Patented Apr. 1, 1952 UNITED STATES iPATENT OFFICE HERMETICALLY SEALED COMPRESSOR AND VACUUM SYSTEM 2 Claims. 1

The invention relates to a hermetically sealed apparatus and more especially to a hermetically sealed compressor or vacuum system.

The primary object of the invention is the provision of a system of this character, wherein one of the difiiculties of the usual compressors is the gas escaping past packing glands is overcome, in that with the system hermetically seals the power unit without the system, thus making it possible for repairs to such unit with ease and dispatch and without disturbing the system or releasing gases therefrom.

Another object of the invention is the provision of a system of this character, wherein the power unit outside of the same can operate a compressor, drive a cooling fan or pump cooling fluids and at the same time the gases in the system will not effect the power unit as well as obviating loss of such fluid.

A further object of the invention is the provision of a system of this character, which is simple in construction, thoroughly reliable and efiicient in operation, strong, durable, positive in the working thereof, possessed of few parts, assuring against gas losses and inexpensive to manufacture and install.

With these and other objects in view the invention consists in the features of construction, combination and arrangement of parts as will be hereinafter more fully described, illustrated in the accompanying drawings, which disclose the preferred embodiment of the invention and pointed out in the claims hereunto appended.

In the accompanying drawings:

Figure 1 is an elevation of the system constructed in accordance with the invention;

Figure 2 is an end view thereof;

Figure 3 is a sectional view taken on the line 3-3 of Figure 1 looking in the direction of the arrows;

Figure 4 is a sectional view taken on the line 4-4 of Figure 3 looking in the direction of the arrows;

Figure 5 is a sectional view taken on the line 5-5 of Figure 3 looking in the direction of the arrows;

Figure 6 is a fragmentary sectional view taken approximately on the line 6--B of Figure 3, looking in the direction of the arrows;

Figure 7 is a detail sectional view taken on the I line '!1 of Figure 6 looking in the direction of the arrows.

Similar reference characters indicate corresponding parts throughout the several views in the drawings.

Referring to the drawing in detail, the system (Cl. 3ii8-187.1)

constituting the present invention, comprises in this instance a base stand l0, for support on a foundation, to which it is secured in any suitable manner, while rising vertically from this stand H) is the intermediate section II of a compressor housing having the opposed horizontally arranged outer compression cylinders 12, which are provided with external inner end annular flanges :3, through which pass fasteners [4 for securing to the section II and in this manner the latter and the cylinders 12 are united together.

Within the cylinders [2 work pistons [5, which are connected by a coupling stem I6, one only, and having opposite threaded ends I! tapped centrally into the said pistons l5 for the reciprocation of the latter together with alternating in and out strokes thereto.

Built into one side cheek 18 of the section II of the housing below the plane of the cylinders 12 which protrude laterally from opposite ends of this section I l is a tubular gland body i9, which removed from its inner end protruding into the said housing has formed therewith an external attaching flange 20 fastened by fasteners 2 I to the cheek 8. The inner and outer ends of the gland body l9 are equipped with caged ball bearings 23 and 23a respectively, for a rocking crank shaft 24, centered within said body IS, with its crank 25 confined within the section II next to and at one side of the stem l6 sweated within the lower end of the body is adjacent the bearings 23 is a closure cap 22 for the sealing of the lower end of the body i9. This crank 25 has link connection 26 to the stem It, so that when the shaft 24 is oscillated by a power unit not shown, having connection thereto by an operation arm 21 fitted at 28 to the outer end of such shaft 24.

Within the gland body l9 and about the shaft 24 is a sleeve-like flexible oval and tapered sealing membrane 32, which comprises a plurality of slidably related oval shaped ring members 32a having olfset sealing end flanges 32b and 32c respectively, see Figure 7, which prevent leakage of the gas during the rocking motion of the shaft 24 The membrane 32 has its smaller end 29 sealed to a collar 30 snugly embracing the shaft 24, while its larger end 3| is sealed against a second collar 36 snugly embracing the shaft and next to the bearings 23a and oval shaped fastening means 29a and 3 I a respectively seal the ends 29 and 3| of the membrane to the collars. The fastening means 29a and 3| a being recessed in their respective collars and the collars having a close tolerance with the interior of the body. In this manner the gland is rendered fluid tight to avoid gas leakage there through from the com- 4 slidable ring shaped members fixed at the opposite ends to said collars by said fastening means.

2. The invention as in claim 1 wherein the ends of said ring shaped members are provided with ofiset flanges for the sealing of said members.

JOHN J. DAVIS.

REFERENCES CITED The following references are of record in the and is not subjected to gases within such system 10 file of this patent:

and used for refrigeration.

What is claimed is:

l. A sealing construction for use with a rocking shaft within a hollow housing comprising roller bearing units mounted in the ends of said housing and receiving the shaft, a sealing cap carried by one end of the housing outwardly of one of the bearing units at the end of the housing and receiving the shaft, collars on the shaft inwardly of the roller bearing units, oval recesses in the inner faces of the collars, oval shaped fastening means seated in the recesses and a flexible membrane composed of a plurality of oval shaped UNITED STATES PATENTS Number Name Date 888,762 Spencer May 26, 1908 1,566,620 Scoville Dec. 22, 1925 1,686,339 Murray Oct. 2, 1928 1,760,636 Fortune et al. May 27, 1930 1,769,978 West July 8, 1930 2,441,618 Cole 1. May 18, 1948 FOREIGN PATENTS Number Country Date 441,736 France Aug. 14, 1912 

